Flinty \Flint"y\, a. [Compar. Flintier; superl. Flintiest.]

Consisting of, composed of, abounding in, or resembling, flint; as, a flinty rock; flinty ground; a flinty heart.

Flinty rock, or Flinty state, a siliceous slate; -- basanite is here included. See Basanite.

Source: Webster's Revised Unabridged Dictionary (1913)